/*
 * Copyright (c) 2012 Johann Hanne
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

#ifndef _PORTIO_H
#define _PORTIO_H

unsigned short inp(unsigned short port);
unsigned short inpw(unsigned short port);
unsigned short outp(unsigned short port, unsigned short value);
unsigned short outpw(unsigned short port, unsigned short value);

#ifdef __INLINE_FUNCTIONS__
#pragma intrinsic(inp,inpw,outp,outpw)
#else /* __INLINE_FUNCTIONS__ */

#pragma aux inp = ""  \
  "in al,dx" \
  "xor ah,ah" \
  modify [ax] value [ax] parm [dx];

#pragma aux inpw = ""  \
  "in ax,dx" \
  modify [ax] value [ax] parm [dx];

#pragma aux outp = "" \
  "out dx,al" \
  parm [dx] [ax] value [ax];

#pragma aux outpw = "" \
  "out dx,ax" \
  parm [dx] [ax] value [ax];

#endif /* __INLINE_FUNCTIONS__ */

#define iow_setbits(port, bits) outpw(port, inpw(port) | (bits));
#define iow_clearbits(port, bits) outpw(port, inpw(port) & ~(bits));

#endif /* _PORTIO_H */
